Ubuntu and windows dual boot

[crown711]

Ubuntu is on a dell mini and would like something
i know about for second boot (dual boot)

 

[Jodell88]

The easiest way will be to backup your data, install windows and then install Ubuntu. Windows never plays nice with other Operating Systems.

 

[MrColin]

You shouldn't have to reinstall ubuntu after windows, but you will have to reinstall grub to be able to boot ubuntu. Google for how to reinstall grub after windows. I would advise you to create a new partition for windows before installing it from a live distro instead of the windows installer interface.